Table 4.
Association between community-level social vulnerability and being unvaccinated for COVID-19 at follow-up.
| SVI Domain |
Frequency N (%) |
Unadjusted risk ratio, RR (95% CI) | Adjusted risk ratio, aRR (95% CI)1,2,3,4 |
|---|---|---|---|
| Overall | 139/290 (47.9) | ||
| Social Vulnerability Index (SVI) | |||
| Quartile 15 Quartile 2 Quartile 3 Quartile 4 |
26/89 (29.2) 23/73 (31.5) 43/67 (64.2) 47/61 (77.1) |
1.00 1.32 (0.92 to 1.89) 1.16 (0.78 to 1.71) 1.73 (1.23 to 2.43) |
1.00 1.00 (0.66 to 1.51) 1.68 (1.17 to 2.41) 1.82 (1.30 to 2.56) |
| Domains (1–4) | |||
| 1: Socioeconomic status | |||
| Quartile 1 Quartile 2 Quartile 3 Quartile 4 |
24/87 (27.6) 23/75 (30.7) 39/63 (61.9) 53/65 (81.5) |
1.00 1.11 (0.68 to 1.80) 2.19 (1.47 to 3.26) 2.95 (2.06 to 4.23) |
1.00 1.09 (0.71 to 1.68) 1.73 (1.19 to 2.52) 2.16 (1.53 to 3.04) |
| 2: Household composition and disability | |||
| Quartile 1 Quartile 2 Quartile 3 Quartile 4 |
24/88 (27.3) 30/78 (38.5) 41/64 (64.1) 44/60 (73.3) |
1.00 1.41 (0.90 to 2.19) 2.30 (1.55 to 3.41) 2.68 (1.84 to 3.90) |
1.00 1.35 (0.92 to 1.99) 1.93 (1.37 to 2.72) 1.83 (1.28 to 2.62) |
| 3: Minority status and language | |||
| Quartile 1 Quartile 2 Quartile 3 Quartile 4 |
27/69 (39.1) 34/77 (44.2) 31/76 (40.8) 47/68 (69.1) |
1.00 1.13 (0.76 to 1.68) 1.06 (0.71 to 1.60) 1.80 (1.28 to 2.54) |
1.00 0.90 (0.63 to 1.27) 0.93 (0.65 to 1.33) 1.25 (0.92 to 1.69) |
| 4: Housing type and transportation | |||
| Quartile 1 Quartile 2 Quartile 3 Quartile 4 |
31/83 (37.4) 40/80 (50.0) 31/70 (44.3) 37/57 (64.9) |
1.00 1.32 (0.92 to 1.89) 1.16 (0.78 to 1.71) 1.73 (1.23 to 2.43) |
1.00 1.30 (0.96 to 1.78) 1.09 (0.77 to 1.55) 1.42 (1.05 to 1.93) |
Abbreviations: SVI: social vulnerability index, RR: risk ratio, aRR: adjusted risk ratio, CI: confidence interval.
Model adjusted for: age, race and ethnicity, parity, trimester of pregnancy at baseline, chronic comorbidities, time from baseline to follow-up assessment, and pregnant at follow-up.
Unadjusted and adjusted risk ratios calculated using modified Poisson regression with robust error variance.
N = 290 in the unadjusted model and 288 in the adjusted model.
aRR per every one unit increase in SVI quartile.
Mean SVI (0 to 1) by quartile among individuals with follow-up data: <25%, 0.07; ≥25-49%, 0.27; ≥50-74%, 0.57; and ≥ 75–100%, 0.83.